First of all, the electric vehicle fast charge and slow charge interfaces are corresponding to DC and AC interfaces, DC fast charge and AC slow charge. Under normal circumstances, the fast charge interface is 5, and the slow charge is 7. In addition, it can also be seen from the charging line that fast charging and slow charging, and the fast charging line is relatively stronger. Of course, some electric vehicles have only one charging mode for cost, battery capacity and other considerations, so there will be only one charging port.
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Fast charge is what we call DC charging, in general, the DC voltage of fast charge will be greater than the battery voltage. Generally, 80% of the capacity can be reached in half an hour, while slow charging takes a longer time, and it may take more than six hours to fully fill the battery. At the current level of technology, although the battery can be charged to 80% in 30 minutes, the remaining 20% must reduce the current to limit the charging power to ensure the safety and life of the battery.
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Because the fast charge is the direct current directly stored in the battery, so the fast charge for the battery will be very high, the power of the direct current is very large, charging is to let the electrons accelerate from the positive to the negative flow, so a long time or frequent fast charge, will lead to the battery pack temperature rise, the battery decay will be faster.
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The process of charging is that the electrons inside the battery go from positive to negative, fast charging mode, the flow rate of electrons is accelerated, may cause the battery to heat up too fast, may not be able to balance the charge, that is, we usually charge the mobile phone will be common \"virtual\
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The slow charge is the use of alternating current, current and power are relatively small, although the charging time will be longer, but the battery life has a good guarantee, the cost of electricity will be relatively low. However, fast charging will not necessarily seriously damage the battery, after all, most battery factories will be equipped with a battery management system when developing the battery system, which will be provided to everyone in the case of battery safety. But keep in mind that no matter how perfect the battery is, long-term rapid charging will eventually affect the life of the battery. You don't need to worry too much about the occasional quick charge.
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All in all, slow charge time is too long, fast charge damages battery life, hope that the future charging mode technology of wireless charge that is currently being developed can get more support, and can be popularized and applied more quickly.
Specifically, fast charging will accelerate the polarization of the battery cell, which directly affects the service life of new energy vehicles. Secondly, fast charging can easily lead to lithium analysis of new energy vehicle battery cells, resulting in a reduction in lithium ions, which will eventually lead to a decline in battery capacity, which will have an impact on battery life.
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The slow charge is the charging interface of the AC charging pile, which inputs the alternating current of the grid into the slow charge port of the electric vehicle, converts the alternating current into direct current through the charger inside the car, and completes the charging in the input battery. Compared with fast charging, the impact on the battery is relatively small, and the service life of the battery is relatively longer.